Singer-songwriter and multi-instrumentalist Jacob Collier answers the internet's buzzing questions about instruments and musical theory. What is the difference between black and white piano keys? What makes up the rhythm section? What makes a bass line sound funky?br br Director: Justin Wolfsonbr Director of Photography: Francis Bernalbr Expert: Jacob Collierbr Line Producer: Joseph Buscemibr Associate Producer: Paul Gulyas; Brandon Whitebr Production Manager: D.